Guess that main sources for fundamental analysis are news, economical forums and various analytical tools, which can help you to determine the direction of your trading activity. Everybody knows that fundamental analysis applies to long-term trading activity, hence it's a bit easier for such traders to stay mentally stable. They don't have to look at the charts throughout a day, mainly because they open a position for long-term purposes, for example for a week or month. So, you should check the news and analyse the words of some economists regarding your preferable asset. Of course, if there is an emergency or unpleasant situation on the market you have to exit a deal.